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Investments in Associates and Joint Ventures - Summary of Investments Information (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2017
Central Dock Sud SA [member]
Disclosure of transactions between related parties [line items]
The Group indirect holding in capital stock through Inversora Dock Sud S.A.	29.99%

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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- Definition

Proportion of indirect ownership interest in associates.

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No definition available.

+ Details

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- Details

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